Carinthia (, ), also Slovene Carinthia or Slovenian Carinthia (Slovenska Koroška), is a traditional region in northern Slovenia. The term refers to the small southeasternmost area of the former Duchy of Carinthia, which after World War I was allocated to the Kingdom of Serbs, Croats and Slovenes according to the 1919 Treaty of Saint-Germain. It has no distinct centre, but a local centre in each of the three central river valleys among the heavily forested mountains.